AMMAN, Feb 15 (Reuters) - Syria's opposition coalition isready to negotiate President Bashar al-Assad's exit with anymember of his government who has not participated in hismilitary crackdown on the uprising, coalition members said onFriday.

Syrian authorities have given no formal response to severaloffers of talks in recent weeks. But officials say they cannotaccept pre-conditions about Assad's departure and have privatelydismissed what they say are no more than media initiatives.

The political chasm between the sides, along with diplomaticdeadlock among world powers preventing effective intervention,has allowed fighting on the ground to rage on with almost 70,000people killed in 22 months of conflict, by a U.N. estimate.

Opposition leader Moaz Alkhatib made an offer ofnegotiations last month without consulting the coalition's70-member assembly, prompting criticism from a powerful blocwithin the movement dominated by the Muslim Brotherhood.

Syrian Foreign Minister Walid al-Moualem is due to visitMoscow, one of Assad's main foreign allies, later this month. Russia also hopes Alkhatib will visit soon in search of abreakthrough to end the bloodiest of the Arab Spring uprisings.

But coalition members say no date has been set for anAlkhatib trip to Moscow and Syria's Foreign Ministry played downsuggestions that Moualem and Alkhatib could meet there, sayingany dialogue must take place in Syria.

An overnight meeting of the coalition's 12-member politburoin Cairo endorsed Alkhatib's initiative, although it setguidelines for any peace talks which will be presented forapproval by the full assembly next Thursday.

"These guidelines stipulate that Bashar al-Assad and all thesecurity and military leaders that (have) participated in thekilling of the Syrian people and whose hands are stained withblood have no place in the Syria of the future," coalitionmember Abdulbaset Sieda told Reuters in Cairo after the meeting.

"We agreed to reassure the Syrian brothers from the (ruling)Baath Party whose hands are not stained with the blood of theSyrian people that they are partners in the coming politicalprocess."

Another opposition member said next week's gathering of thefull coalition would try to revive plans for a provisionalgovernment, undermined so far by divisions among Assad's foes.

Walid Bunni, one of a handful of liberals in theIslamist-heavy assembly, told Reuters that Assad and hismilitary and intelligence officials could not be part of anynegotiations.

"Bashar and his cohorts will not be party to any talks. Wewill not regard those present from the government's side as hisrepresentatives," Bunni said.

He said the meeting addressed how to deal with Iran andRussia, Assad's main supporters, after Alkhatib met the foreignministers of Russia and Iran in Munich earlier this month.

NO SIGN OF DIALOGUE

Alkhatib has said he is willing to hold talks with Assad'srepresentatives in rebel-held areas of Syria or outside thecountry to try to end the conflict. Syria's minister fornational reconciliation, Ali Haidar, initially gave a positiveresponse, saying he was willing to travel abroad to meet him.

But in an interview on state television this week Haidarreiterated the government's position that any serious dialoguemust be on Syrian territory and said the opposition had notformally presented any proposals.

"There is no initiative at the table of the Syriangovernment," he said. "The government is not a media office toanswer ideas through the media."

Haidar has also said the authorities reject any dialoguethat aims "to hand power from one side to another".

Alkhatib has headed the Syrian National Coalition since itwas founded last December in Qatar with Western and Gulfbacking. He has quietly built up a student following and linkswith civic and religious figures across Syria, although he hasno control over armed insurgents seeking Assad's overthrow.

Rebels captured the town of Shaddadeh in the eastern,oil-producing province of Hasakah on Thursday after three daysof battles in which activists said 30 members of the alQaeda-linked, anti-Assad, Nusra Front and 100 soldiers werekilled.

The United Nations food agency WFP said on Friday that anestimated 40,000 people had fled Shaddadeh for the provincialcapital Hasakah, 45 km (30 miles) to the north.

But the army's firepower in the east remains formidable,rebels say. An activist in the city of Deir al-Zor, where rebelslaunched an operation this week to expel Assad's forces, cameunder the heaviest artillery barrages since the start of theconflict from the airport and surrounding bases to the south.